You are immune to disease and poison and do not need to breathe while above half health.

It is possible to integrate small things like a spell focus, into your jar.

Rather than sleep, brains in jars enter a meditative state known as trance. You need to spend 4 hours in this state to gain the same benefits other races gain from taking a long rest.

You can speak, read, and write Common and Undercommon.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were
dim light. You can’t discern color in darkness, only shades of grey.

Brain. Even though you are just a brain floating in fluid, you are still, in a way, alive. Having no muscles, you automatically fail all Strength checks. You also have no appendages to manipulate the world.

Having no hands/body, you have learnt to make do with alternate means. You gain the mage hand cantrip and do not need to perform somatic components or provide material components costing less than 1 gold piece.